Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Semiconductor memory having self correction function










Image Number 19 for United States Patent #4747080.

A semiconductor memory having a self correction function, includes: a plurality of memory cells which are divided into a plurality of area groups, store data, and are arranged in a matrix; a plurality of parity cells, associated with the area groups of the memory cells, for forming horizontal and vertical parity codes together with the data in the memory cells of the respective area groups; word lines for simultaneously selecting the plurality of memory cells and the parity cells; bit lines for exchanging data with the memory cells; parity bit lines for exchanging parity bit data with the parity cells; selectors for selecting data of the memory cells and data of the parity cell in the area group to which a memory cell to be checked belongs; means for performing parity check of a plurality of data from the selectors; and means for automatically correcting a bit error using the output from the parity check means. The memory cells divided into the area groups and the parity cells combined therewith are arranged so as not to belong to the same horizontal and vertical arrays of the matrix.








 
 
  Recently Added Patents
Permanent magnet axial field zeeman slower
Maltol ether processes and intermediates
Level shifter and method of using the same
Method for computer-based determination of a position in a map, navigation device and mobile radio telephone
Method and apparatus for allocating erasure coded data to disk storage
Projection screen and projection system having the same
Method and apparatus for providing auto-completion of information
  Randomly Featured Patents
Glass enclosed three lead circuit breaker
Glass container inspection machine
Cochlear implant sound processor with permanently integrated replenishable power source
Vehicle suspension control system
Magnetic transducer with recessed magnetic elements
Communication station with automatic cable loss compensation
Vacuum exhaust valve
Hitch mounted banner display system
Pivoted projection having mixer valve
Communication device